Arrangement for operating rods



Feb. 16, 1932. T. ZERBI ARRANGEMENT FOR OPERATING RODS Filed Jan. 4, 1950 Patented Feb. 16, 1932 UNITED STATES "PATENT OFFICE TBALN'QUILLO ZERBI, OE TURIN, ITALY, ASSIGNOR TO FIAT SOCIETA ANONIMA, OI

, TURIN, ITALY ARRANGEMENT FOR OPERATING RODS Application filed January 4, 1930, Serial No. 418,620, and in Italy March 30, 1929.

traversed by the rod as well as to assist the rod in resuming its normal position when it 1s no longer acted upon.

The arrangement according to this lnvention comprises a resilient device constituted by a spring, preferably a helical spring, compressed between two washers of which one is secured to the rod, whilst the other washer is freely mounted on the rod and bears, under the pressure exerted by the spring, on the wall traversed'by the rod thus establishing a frictional resistancefwhich is capable of damping or brakmgthe vibrations and oscillations, the said washer closing at the same time the relatively large hole in the wall through which the rod passes.

The helical spring of the device serves also to return the rod to its normal position when it is released."

The accompanying drawing shows by way of example a constructional form of the device according to this invention used in con-' nection with a brake tension rod in the point where sald rod traverses the engine mud l'denotes the rod and 2 theengine mud shield which is provided with a relatively large bore 3 traversed by the rod. The device according to the invention comprises a returns or assists the rod 1 in returning to its normal position when it is released.

lVhat I claim is: i

' Resilient return means for a rod passing through a hole larger than the rod in a box Wall, comprising a spiral spring surrounding the rod, a washer fixed to the rod spaced from.

the wall and against which one end of said spring bears and a second washer slidablymounted on the rod and pressed by the spring against'said wall for closing the hole and for opposing a frictional resistance to the lateral In testimony that I claim the foregoing as my invention, I have signed my name.

ING. TRANQUILLO ZERBI.

5 of suitable material and suflicient diameter,

loosely mounted on the rod and resting on the mud shield 2 so as to close the bore 3.

The friction between the washer 5 and the mud shield wall 2, due to the pressure transmitted by the helical spring 4, damps the it vibrations of the rod 1; at the same time the washer 5 closes the bore 3 and, the springfl 

